Stair step display



FIG. 1 is a front upright perspective view of a stair step displayshowing my new design;

FIG. 2 is a front perspective exploded view thereof;

FIG. 3 is a front perspective view of the frame of the stair stepdisplay thereof shown without the steps for ease of illustration; and,

FIG. 4 is a side perspective view of the stair step display.

The ornamental design for a stair step display, as shown.